English verb conjugation MUST ABSTAIN

Regular verb: abstain - abstained - abstained

Affirmation

Simple form

I must abstain
you must abstain
he must abstain
we must abstain
you must abstain
they must abstain

V-ing form

I must be abstaining
you must be abstaining
he must be abstaining
we must be abstaining
you must be abstaining
they must be abstaining

Perfect

I must have abstained
you must have abstained
he must have abstained
we must have abstained
you must have abstained
they must have abstained

V-ing perfect

I must have been abstaining
you must have been abstaining
he must have been abstaining
we must have been abstaining
you must have been abstaining
they must have been abstaining

Negation

Simple form

I mustn't abstain
you mustn't abstain
he mustn't abstain
we mustn't abstain
you mustn't abstain
they mustn't abstain

V-ing form

I mustn't be abstaining
you mustn't be abstaining
he mustn't be abstaining
we mustn't be abstaining
you mustn't be abstaining
they mustn't be abstaining

Perfect

I mustn't have abstained
you mustn't have abstained
he mustn't have abstained
we mustn't have abstained
you mustn't have abstained
they mustn't have abstained

V-ing perfect

I mustn't have been abstaining
you mustn't have been abstaining
he mustn't have been abstaining
we mustn't have been abstaining
you mustn't have been abstaining
they mustn't have been abstaining

Interrogative form

Simple form

must I abstain?
must you abstain?
must he abstain?
must we abstain?
must you abstain?
must they abstain?

V-ing form

must I be abstaining?
must you be abstaining?
must he be abstaining?
must we be abstaining?
must you be abstaining?
must they be abstaining?

Perfect

must I have abstained?
must you have abstained?
must he have abstained?
must we have abstained?
must you have abstained?
must they have abstained?

V-ing perfect

must I have been abstaining?
must you have been abstaining?
must he have been abstaining?
must we have been abstaining?
must you have been abstaining?
must they have been abstaining?

Interro-negative form

Simple form

mustn't I abstain?
mustn't you abstain?
mustn't he abstain?
mustn't we abstain?
mustn't you abstain?
mustn't they abstain?

V-ing form

mustn't I be abstaining?
mustn't you be abstaining?
mustn't he be abstaining?
mustn't we be abstaining?
mustn't you be abstaining?
mustn't they be abstaining?

Perfect

mustn't I have abstained?
mustn't you have abstained?
mustn't he have abstained?
mustn't we have abstained?
mustn't you have abstained?
mustn't they have abstained?

V-ing perfect

mustn't I have been abstaining?
mustn't you have been abstaining?
mustn't he have been abstaining?
mustn't we have been abstaining?
mustn't you have been abstaining?
mustn't they have been abstaining?

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